DMVPN hierarchical topology

DMVPN can be employed using a hierarchical topology. In such a topology, there are multiple levels of DMVPN hubs. This means that a spoke can also be a hub to additional sub-spokes.

A hierarchical DMVPN topology can sometimes be considered as a third DMVPN topology, such as DMVPN dual hub dual cloud and DMVPN dual hub single cloud.

A hierarchical DMVPN topology requires the use of DMVPN Phase 3.

Links:

https://www.cisco.com/c/en/us/support/docs/security/dynamic-multipoint-vpn-dmvpn/211292-Configure-Phase-3-Hierarchical-DMVPN-wit.html

https://forum.networklessons.com/t/dmvpn-phase-3-basic-configuration/1311/43?u=lagapides